The circle graph represents how the Townsends spend their monthly income.
Total central angle of the circle is 360°
Townsend saves 5% of the monthly budget.
Therefore, the central angle measure of the section that represents "Savings" is 5% of the total central angle
= 5% of 360°
= 18°
The central angle measure of the section that represents "Savings" is 18°
Hope this helps ..!!
Thank you :)